L-cysteine-assisted synthesis and optical properties of Ag2S nanospheres

Journal article

Ag2S nanospheres were synthesized by a hydrothermal reaction using L-cysteine as the sulfur source and chelating reagent. The X-ray diffraction patterns and X-ray photoelectron spectra confirmed that the products were monoclinic α-Ag2S. The optical absorption spectra of the Ag2S nanospheres showed very broad absorption peaks centered at about 515 nm in wavelength. Photoluminescence spectra exhibited emission peaks centered at ∼637 nm in wavelength accompanied by weaker shoulder peaks at ∼590 nm in wavelength when the sample was excited with a wavelength of 490 nm. In addition, the formation mechanism of the Ag2S nanospheres was also determined. The l-cysteine-assisted hydrothermal route using L-cysteine as the sulfur source and chelating reagent provides an alternative approach to generate sulfide nanocrystals. © 2008 American Chemical Society.

Authors: Xiang, J; Cao, H; Wu, Q; Zhang, S; Zhang, X

• Publication status: Published
• Journal: JOURNAL OF PHYSICAL CHEMISTRY C
• Volume: 112
• Issue: 10
• Pages: 3580-3584
• Publication date: 2008-03-13
• DOI: 10.1021/jp710597j
• EISSN: 1932-7455
• ISSN: 1932-7447
• Language: English